How this GP missed an obvious diagnosis for 10 years

Since medicine is such a relationship-based vocation, I find myself very often looking at my patients as people and not as clinical subjects. I have to keep reminding myself to do both.
I saw a cancer survivor recently whom I have known for 10 years. I had referred him to a neurologist because of an atypical tremor. The neurologist diagnosed my patient with Parkinson’s disease, but also pointed out that he had Horner’s Syndrome (droopy upper eyelid, small pupil and sunken in eye).